Add options to bin/check_https.rb

[ldidry]

• add an option to disable IPv4 or IPv6 check (when running docker run --rm aeris22/cryptcheck:v2 bin/check_https.rb, IPv6 check fails, would be cool to just do an IPv4 check)
• add an option to have only a JSON output (so it can be processed by scripts, may be with a Nagios probe)

[ldidry]

• add an option to specify the path for the check (for ex, I can't do a HEAD / on my Ceph S3 API (it returns a 403 status, without the STS header), but I can do it on a file.).

[ldidry]

ping @aeris

[diyfr]

• add an option to use/add internal certificate authority. cert.rb#12